Keep in mind that that radius is true for non-drifting turns in hardpack or so.
You can turn any board in tighter radius with some drifting(i dont know exact term, hope you understand what i mean) and with losing some speed, and moment of force.
In powder you can turn tighter that listed and it'd be fun.

I have checked the furbergs out, not a fan personally.
The radius doesnt matter in pow but you do spend a fair amount of time bombing groomers to get to the pow so its handy to have a board that handles well on hardpack aswell.

true =)
That's why i got my donek. You can check the quiver on a last page in "12-13 setup" thread =)